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manual; try to clarify better how variable contracts are used by cppcheck

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Daniel Marjamäki 2020-08-28 19:42:52 +02:00
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man/manual.md
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@ -995,6 +995,13 @@ Here is an example code:
The bug hunting analysis will warn about a division by zero. It can't be proven The bug hunting analysis will warn about a division by zero. It can't be proven
that x can't be 0. that x can't be 0.
A variable contract specify the allowed values for a variable. Cppcheck use variable
contracts both when a variable is read and written:
- When a variable is read, Cppcheck will assume that the contract is met. This
means you can avoid false positives for impossible variable values.
- When a variable is written, Cppcheck will ensure that its contract is not
violated. If it can't be determined that the contract is met you will get a
warning.
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